Adding reasonDesc to codewhisperer_securityScan event

Author: laileni-aws

telemetry/definitions/commonDefinitions.json

@@ -3912,6 +3912,10 @@
                     "type": "reason",
                     "required": false
                 },
+                {
+                    "type": "reasonDesc",
+                    "required": false
+                },
                 {
                     "type": "result"
                 }